The route exports prerender = true and is listed in
svelte.config.js's prerender.entries. Until now the auth hook
redirected unauthenticated requests to /login, so the prerender
crawler hit a 302 and the build failed with "marked as prerenderable,
but were not prerendered".
Adding the path to PUBLIC_PATHS lets the crawler render the static
HTML; consistent with the route's intent as a public help page.
Surfaced by #497 (the production Docker build is the first place
npm run build runs in CI).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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